CVE-2026-9602

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-9602
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9602.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-9602
Published
2026-07-17T10:03:26Z
Modified
2026-10-28T02:31:03Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Mattermost Desktop App crashes when malformed arguments are provided to some exposed IPC methods
Details

Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00678

Database specific 
{
    "cna_assigner":  "Mattermost",
    "cwe_ids":  [
        "CWE-400"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9602.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "last_affected":  "6.0.2"
                        },
                        {
                            "last_affected":  "5.6.13"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StandardRange"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/mattermost/desktop

Affected ranges

Type
GIT
Repo
https://github.com/mattermost/desktop
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
6c31af67e4228f2d4c31aaa2242a7a59c46fa6de
Introduced
dd2c7c4b66d726250980171a113a8764ab8f8777
Last Affected
30a408117be7b1f7adb21f0a70dd1610c2e6eaaa
Introduced
200c274b361a2dcb7d7e8208adc44bdcd4645616
Fixed
9569d76bd8de2f8255fe80f0b9379dc429198c82
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "5.13.7"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "cpe":  "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "6.0.0"
                },
                {
                    "last_affected":  "6.0.2"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "cpe":  "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "6.2.0"
                },
                {
                    "fixed":  "6.2.1"
                }
            ],
            "source":  "CPE_RANGE"
        }
    ]
}

Affected versions

4.*
4.7.0-beta
Other
beta2
v0.*
v0.1.0
v0.2.0
v0.3.0
v0.4.0
v0.5.0
v0.5.1
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v1.1.0
v1.1.1
v1.2.0
v1.3.0
v1.3.0-rc1
v1.3.0-rc2
v4.*
v4.7.0-beta2
v5.*
v5.13.0
v5.13.0-mas.1
v5.13.0-rc.1
v5.13.1
v5.13.1-mas.1
v5.13.1-rc.1
v5.13.1-rc.2
v5.13.2
v5.13.2-mas.1
v5.13.2-rc.1
v5.13.3
v5.13.3-rc.1
v5.13.4
v5.13.4-rc.1
v5.13.5
v5.13.5-rc.1
v5.13.6
v5.13.6-rc.1
v5.13.6-rc.2
v5.13.7-rc.1
v6.*
v6.0.0
v6.0.0-mas.1
v6.0.1
v6.0.1-mas.1
v6.0.1-rc.1
v6.0.1-rc.2
v6.0.2
v6.0.2-mas.1
v6.0.2-rc.1
v6.0.2-rc.2
v6.2.0
v6.2.0-mas.1
v6.2.1-mas.1
v6.2.1-rc.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9602.json"